He is writing a thesis on fluid dynamics.

The tesseract represents a four-dimensional geometric shape.

The 正五胞體 is a simple convex polytope in four dimensions, having five vertices.

He made a model of a dodecahedron.

This regular tetrahedron is composed of equilateral triangles on all sides.

This chamfered cube is one of the shapes in mathematics, and it has the characteristic that all faces are equal.

He is a Chinese person.

He urged us to hurry, saying 'time and tide wait for no man.'

He is a foreigner, but he can speak Japanese fluently.

Please imagine the day when aliens come to Earth.